Ten years on from the events of Monsters, and the 'Infected Zones' have now spread worldwide. In the Middle East a new insurgency has begun. At the same time there has also been a proliferation of Monsters in that region. The Army decide to draft in more numbers to help deal with this insurgency.

Poppy Cross is happy-go-lucky. At 30, she lives in Camden: cheeky, playful, frank while funny, and talkative to strangers. She's a conscientious and exuberant primary-school teacher, flatmates with Zoe, her long-time friend; she's close to one sister, and not so close to another. In this slice of life story, we watch her take driving lessons from Scott, a dour and tightly-wound instructor, take classes in flamenco dance from a fiery Spaniard, encounter a tramp in the night, and sort out a student's aggressive behavior with a social worker's help. Along the way, we wonder if her open attitude puts her at risk of misunderstanding or worse. What is the root of happiness?